gecko-dev/dom/media/fmp4/gonk/GonkAudioDecoderManager.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MediaCodecProxy.h"
#include <OMX_IVCommon.h>
#include <gui/Surface.h>
#include <ICrypto.h>
#include "GonkAudioDecoderManager.h"
#include "MediaDecoderReader.h"
#include "mp4_demuxer/Adts.h"
#include "VideoUtils.h"
#include "nsTArray.h"
#include "prlog.h"
#include "stagefright/MediaBuffer.h"
#include "stagefright/MetaData.h"
#include "stagefright/MediaErrors.h"
#include <stagefright/foundation/AMessage.h>
#include <stagefright/foundation/ALooper.h>
#include "media/openmax/OMX_Audio.h"

#define LOG_TAG "GonkAudioDecoderManager"
#include <android/log.h>
#define ALOG(...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)

#ifdef PR_LOGGING
PRLogModuleInfo* GetDemuxerLog();
#define LOG(...) PR_LOG(GetDemuxerLog(), PR_LOG_DEBUG, (__VA_ARGS__))
#else
#define LOG(...)
#endif
#define READ_OUTPUT_BUFFER_TIMEOUT_US  3000

using namespace android;
typedef android::MediaCodecProxy MediaCodecProxy;

namespace mozilla {

GonkAudioDecoderManager::GonkAudioDecoderManager(
  const mp4_demuxer::AudioDecoderConfig& aConfig)
  : mAudioChannels(aConfig.channel_count)
  , mAudioRate(aConfig.samples_per_second)
  , mAudioProfile(aConfig.aac_profile)
  , mAudioBuffer(nullptr)
  , mUseAdts(true)
{
  MOZ_COUNT_CTOR(GonkAudioDecoderManager);
  MOZ_ASSERT(mAudioChannels);
  mUserData.AppendElements(&aConfig.audio_specific_config[0],
                           aConfig.audio_specific_config.length());
  // Pass through mp3 without applying an ADTS header.
  if (strcmp(aConfig.mime_type, "audio/mp4a-latm") != 0) {
      mUseAdts = false;
  }
}

GonkAudioDecoderManager::~GonkAudioDecoderManager()
{
  MOZ_COUNT_DTOR(GonkAudioDecoderManager);
}

android::sp<MediaCodecProxy>
GonkAudioDecoderManager::Init(MediaDataDecoderCallback* aCallback)
{
  if (mLooper != nullptr) {
    return nullptr;
  }
  // Create ALooper
  mLooper = new ALooper;
  mLooper->setName("GonkAudioDecoderManager");
  mLooper->start();

  mDecoder = MediaCodecProxy::CreateByType(mLooper, "audio/mp4a-latm", false, false, nullptr);
  if (!mDecoder.get()) {
    return nullptr;
  }
  sp<AMessage> format = new AMessage;
  // Fixed values
  ALOG("Init Audio channel no:%d, sample-rate:%d", mAudioChannels, mAudioRate);
  format->setString("mime", "audio/mp4a-latm");
  format->setInt32("channel-count", mAudioChannels);
  format->setInt32("sample-rate", mAudioRate);
  format->setInt32("aac-profile", mAudioProfile);
  format->setInt32("is-adts", true);
  status_t err = mDecoder->configure(format, nullptr, nullptr, 0);
  if (err != OK || !mDecoder->Prepare()) {
    return nullptr;
  }
  status_t rv = mDecoder->Input(mUserData.Elements(), mUserData.Length(), 0,
                                android::MediaCodec::BUFFER_FLAG_CODECCONFIG);

  if (rv == OK) {
    return mDecoder;
  } else {
    ALOG("Failed to input codec specific data!");
    return nullptr;
  }
}

nsresult
GonkAudioDecoderManager::CreateAudioData(int64_t aStreamOffset, AudioData **v) {
  if (!(mAudioBuffer != nullptr && mAudioBuffer->data() != nullptr)) {
    ALOG("Audio Buffer is not valid!");
    return NS_ERROR_UNEXPECTED;
  }

  int64_t timeUs;
  if (!mAudioBuffer->meta_data()->findInt64(kKeyTime, &timeUs)) {
    return NS_ERROR_UNEXPECTED;
  }

  if (mAudioBuffer->range_length() == 0) {
    // Some decoders may return spurious empty buffers that we just want to ignore
    // quoted from Android's AwesomePlayer.cpp
    ReleaseAudioBuffer();
    return NS_ERROR_NOT_AVAILABLE;
  }

  const uint8_t *data = static_cast<const uint8_t*>(mAudioBuffer->data());
  size_t dataOffset = mAudioBuffer->range_offset();
  size_t size = mAudioBuffer->range_length();

  nsAutoArrayPtr<AudioDataValue> buffer(new AudioDataValue[size/2]);
  memcpy(buffer.get(), data+dataOffset, size);
  uint32_t frames = size / (2 * mAudioChannels);

  CheckedInt64 duration = FramesToUsecs(frames, mAudioRate);
  if (!duration.isValid()) {
    return NS_ERROR_UNEXPECTED;
  }
  *v = new AudioData(aStreamOffset,
                     timeUs,
                     duration.value(),
                     frames,
                     buffer.forget(),
                     mAudioChannels,
                     mAudioRate);
  ReleaseAudioBuffer();
  return NS_OK;
}

nsresult
GonkAudioDecoderManager::Output(int64_t aStreamOffset,
                                nsAutoPtr<MediaData>& aOutData)
{
  aOutData = nullptr;
  status_t err;
  err = mDecoder->Output(&mAudioBuffer, READ_OUTPUT_BUFFER_TIMEOUT_US);

  switch (err) {
    case OK:
    {
      AudioData* data = nullptr;
      nsresult rv = CreateAudioData(aStreamOffset, &data);
      if (rv == NS_ERROR_NOT_AVAILABLE) {
        // Decoder outputs an empty video buffer, try again
        return NS_ERROR_NOT_AVAILABLE;
      } else if (rv != NS_OK || data == nullptr) {
        return NS_ERROR_UNEXPECTED;
      }
      aOutData = data;
      return NS_OK;
    }
    case android::INFO_FORMAT_CHANGED:
    case android::INFO_OUTPUT_BUFFERS_CHANGED:
    {
      // If the format changed, update our cached info.
      ALOG("Decoder format changed");
      return Output(aStreamOffset, aOutData);
    }
    case -EAGAIN:
    {
      return NS_ERROR_NOT_AVAILABLE;
    }
    case android::ERROR_END_OF_STREAM:
    {
      ALOG("Got EOS frame!");
      AudioData* data = nullptr;
      nsresult rv = CreateAudioData(aStreamOffset, &data);
      if (rv == NS_ERROR_NOT_AVAILABLE) {
        // For EOS, no need to do any thing.
        return NS_ERROR_ABORT;
      } else if (rv != NS_OK || data == nullptr) {
        ALOG("Failed to create audio data!");
        return NS_ERROR_UNEXPECTED;
      }
      aOutData = data;
      return NS_ERROR_ABORT;
    }
    case -ETIMEDOUT:
    {
      ALOG("Timeout. can try again next time");
      return NS_ERROR_UNEXPECTED;
    }
    default:
    {
      ALOG("Decoder failed, err=%d", err);
      return NS_ERROR_UNEXPECTED;
    }
  }

  return NS_OK;
}

void GonkAudioDecoderManager::ReleaseAudioBuffer() {
  if (mAudioBuffer) {
    mDecoder->ReleaseMediaBuffer(mAudioBuffer);
    mAudioBuffer = nullptr;
  }
}

nsresult
GonkAudioDecoderManager::Input(mp4_demuxer::MP4Sample* aSample)
{
  if (mDecoder == nullptr) {
    ALOG("Decoder is not inited");
    return NS_ERROR_UNEXPECTED;
  }
  if (aSample && mUseAdts) {
    int8_t frequency_index =
        mp4_demuxer::Adts::GetFrequencyIndex(mAudioRate);
    bool rv = mp4_demuxer::Adts::ConvertSample(mAudioChannels,
                                               frequency_index,
                                               mAudioProfile,
                                               aSample);
    if (!rv) {
      ALOG("Failed to apply ADTS header");
      return NS_ERROR_FAILURE;
    }
  }

  status_t rv;
  if (aSample) {
    const uint8_t* data = reinterpret_cast<const uint8_t*>(aSample->data);
    uint32_t length = aSample->size;
    rv = mDecoder->Input(data, length, aSample->composition_timestamp, 0);
  } else {
    // Inputted data is null, so it is going to notify decoder EOS
    rv = mDecoder->Input(0, 0, 0ll, 0);
  }
  return rv == OK ? NS_OK : NS_ERROR_UNEXPECTED;
}

} // namespace mozilla